Gas-inflated airship



April s, 1927.

GAS INFLATED AIRSHI P Filed JulylS. 1926 Patented Apr. 5, 1927.`

UNITED STATES` PATENT OFFICE.

HANS BAUMEISTER, or STUTTGART, WTLHLM E. DRR, or FMEDRICHSHAFEN,:BonENsEn GERMANY, AND KARL immun,- or AKRON, oHIo, AssrGNoRs ToLUFTSCHIFFBAU ZEPPELIN GESELLSCHAFT MIT BESCHRNKTER HAFTUNG, 0F

FBIEDBICHSQHAFEN, GERMANY.

GAS-INFLATED .AIRSHIIIIEv Application filed July 13, 1926, Serial No.

5 for a constant gas temperature or at least to vreduce the fluctuationin gas tempera-ture as far as possible. 'Such fluctuations cause changesin lift ofA the airship and should 'therefore be omitted with regardto'better operation in vertical direction.

It is known to make the outer surface ofVA such ship's brilliant so thatsun rays will be ieected. extent the gas from becoming warmer than onthe ship foi' a longer time the gas Still will gain a certain degree ofovertemperature, which temperature will vanish shortly after the sun hasceased to shine on the ship. Thus the lift of the ship will instantly bereduced. l

According to our invention we are reducing or totally doing away withthis drawback by providing means for preventing the heat in the gas fromdissipating. This for example may be attained by providing a brilliantsurface on the inside of "the gas envelope. Thus, according to oui`invention the'inside surface of the gas bagis made brilliant so as toreflect all heat rays and prevent them from dissipation.l

This means will be of good -efl'ect if used alone as it will prevent orreduce heat dissilpationfrom tliegas into the atmosphere, so that incase of the4 gas having attained over-temperature by whatevercircumstances this temperature lwill be kept constantly or at least bediminishedyery slowly only.

With rigid airships having an outer cover and an inner Vgas envelope theeffect will still be greater,`because both, the outer cover and theinner. gas envelope, 'accordinv to our invention, maybe provided with:bril-i' liant inner surfaces.

A further improvement may be attained by combining our invention ofbrilliant inner surfaces with the above described kiiown method ofmaking the outer surface brilliant. Thus heat will be prevented from sa,entering the gas envelope and it will also be prevented from beinglwithdrawn from t the gas. In this way the fluctuations of the This.will prevent `to a certain the surrounding air. But if the sun shines122,122, and in Germany August 3, 1925.

gas temperature will be reduced to a mini mum. x

' With rigid airships the effect may be doubled, so to say, because ofthe possibility of providing two outer brillant surfaces and two innerbrilliant surfaces. Of

course, according to the prevailing circuinstances, it may be preferableto provide only two or three brilliant surfaces, because the materialnecessary for rendering the surfaces brilliant will afford a certainweight and thereby the disposable lift nof the airship will be reduced.material may be for instance a layer of aluminum powder applied to thevarnish on the envelope before becoming dry. Having given a generaldescription of our invention we. now want to point it out more in detailreferring to the drawing repesenting an example embodying our invenion.

The figure is a diagrammatic vertical cross section through a rigidairship of the Zeppelin type. confine the gas space 10. The gas envelope2-has an outer brilliant lining 5 and an inner-brilliant lining 4. .Theouter cover 3 of the airship also has an inner brilliant lining 6 andan'outer brilliant lining 7.

1. .An arship comprising a bag inflatedl Such brilliant or reflectingwith gas; the envelope of said bag having a l i brilliant inner surfaceadaped to reflect heat rays. y 2. An airship vcomprising a b'ag inflatedwith gas; the envelope of said bag having 'a brilliant -inner surfaceand a brilliant outer surface; said surfaces being adapted to reflectheat rays. p

3. An airshi vcomprising a bag inflated with gas; an an outer cover4vdistanoed from the walls of said bag;` the inside surfaces of said wallsof said bag being brilliant and adapted to reiect heat rays.

4. 'An airshi comprising abag inflated with gas; and) from the walls ofsaid bag; the inside'and the outside surfaces of said walls of said anouter cover -distanced bag being brilliant I.and adapted to reflect heatrays.

5. An. airshi comprising a bag inflated with gas; an an outer coverdistanced from the walls of said bag; the inside surfaces of said wallsof said bags and the inside surface of said outer cover being bril-vliant and adapted to reflect heat rays.

6. An airship comprising a bag inflatedh with gas; and an outer coverdistanced from the walls of said bagj; the inside surfaces of said Wallsof said bags and the outf side surface of said outer cover beingbrilliant and adapted to reflect heat rays.

7. An airship comprising a bag iniated with gas; and an outer coverdistancedfrom the Walls of said bag; the inside and the outside surfacesof said Walls of said bag and the inside surface of Vsaid outer coverbeing brilliant and adapted to reflect heat rays.

9. An airship comprising a bag inflated with gas; and an outer coverdistanced from the walls ot" said bag; the inside and the outsidesurfaces of said Walls of said bag and the outside surface of said outercover being brilliant and adapted to reflect heat rays.

l0. An airship comprising a bag inflated with gas; and an outer coverdistanced from the .walls of said bag; the inside and the outsidesurfaces of said Walls of said bag and of' said outer cover beingbrilliant and adapted to reflect heat rays.

WILHELM E. DRR. HANS BAUMEISTER. KARL HRTTLE.

